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ch22_p2 - 2(a We note that the electric field points...

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2. (a) We note that the electric field points leftward at both points. Using G G F q E = 0 , and orienting our x axis rightward (so ˆ i points right in the figure), we find G F = + × F H G I K J = − × 16 10 40 6 4 10 19 18 . # . # C N C i N i c h which means the magnitude of the force on the proton is 6.4 × 10 –18 N and its direction ˆ ( i)
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